The recent app update for Instagram on Windows 10 has finally added live video streaming support for both mobile and PC devices. Live videos were already available on Android and iOS and became really popular. It's one of the recent features the service has introduced to increase its popularity among active Snapchat users.
Instagram for Windows Phone was always one of the reasons for users to complain about the platform. At first, there wasn't an official client at all, but some good 3rd party alternatives were created by independent developers. Then there was a version for Windows Phone 8.1 which was updated just a few times and always lacked some features compared to variants for other platforms. Instagram then announced that they were bringing the full Instagram experience to Windows 10, including both Mobile and PC apps. These apps are still being updated. Instagram has started to close some feature gaps. They are adding a Live Tile for Instagram, a feature unique to the Windows platform.